Question about Sharp Microwave Ovens
A loud buzz, hum, or groan is usually a shorted high voltage rectifier diode,
but a sound like gurgling into an empty
coffee mug is one symptom of a failed magnetron.
Since it's less than a year old, it's fully under warranty and Sharp will fix it free.
You can contact Sharp at 1-800-BE-SHARP (1-800-237-4277) or visit them online to get it fixed.
We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.
Posted on Jan 31, 2010
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Posted on Jan 02, 2017
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I always recommend that folks put food off-center on the turntable to assure more even heating.
It's a stirring action, so imagine how inefficient it would be to stir just by twirling a spoon in the center of your coffee!
Also, when you put your food off-center, you're not putting it in the same spot every time. That will help prevent repeated heating of the the same spot on the glass, which can lead to weakness and cracking.
The turntable generally replaces the stirrer, which actually scrambles and stirs the microwaves as they come out of the waveguide from the magnetron. But some models, notably GE's, have both.
So if you're placing the food properly and it's still burning, since it's under warranty, contact Sharp at 1-800-BE-SHARP (1-800-237-4277) to see about getting it checked.
Oct 21, 2007 | Sharp R-420DK Microwave Oven
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